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(11)

EP 1 133 855 A1

(12)

(43) Date of publication: 19.09.2001 Bulletin 2001/38 (21) Application number: 99963708.5 (22) Date of filing: 15.11.1999

(51) International Patent Classification (IPC)7: H04L 12/64, H04L 12/403 (86) International application number: PCT/SE9902/085 (87) International publication number: WO 0031/932 (02.06.2000 Gazette 2000/22)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 24.11.1998 US 109692 P 07.07.1999 US 348495 (71) Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (publ) 126 25 Stockholm (SE)	(72) Inventor: HAARTSEN, Jaap NL-7772 BG Hardenberg (NL) (74) Representative: Boesen, Johnny Peder et al Hofman-Bang Zacco A/S,Hans Bekkevolds Allé 7 2900 Hellerup 2900 Hellerup (DK)